The broad-band spectrum of the narrow-line Seyfert 1 NGC 4748: from UV to hard X-ray
Sign Up to like & getrecommendations! Published in 2018 at "Astrophysics and Space Science"
DOI: 10.1007/s10509-018-3447-2
Abstract: We report the results obtained by a broad-band (0.5–500 keV) data analysis of narrow-line Seyfert 1 galaxy NGC 4748 observed with an XMM-Newton/PN, INTEGRAL/ISGRI and SWIFT/BAT telescopes. This galaxy has a soft X-ray excess that… read more here.
Keywords: narrow line; ngc 4748; model; line seyfert ... See more keywords
Gamma-ray emitting narrow-line Seyfert 1 galaxies: Past, present, and future
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Astrophysics and Astronomy"
DOI: 10.1007/s12036-019-9604-3
Abstract: This article reviews our current understanding about $\gamma$-ray detected narrow-line Seyfert 1 ($\gamma$-NLSy1) galaxies. The detection with the Large Area Telescope onboard {\it Fermi}~Gamma-ray Space Telescope has provided the strongest evidence for the presence of… read more here.
Keywords: line seyfert; narrow line; gamma ray; gamma ... See more keywords
Spectro-timing analysis of a highly variable narrow-line Seyfert 1 galaxy NGC 4748 with AstroSat and XMM-Newton
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Astrophysics and Astronomy"
DOI: 10.1007/s12036-021-09719-1
Abstract: We present a detailed timing and spectral study of an extremely variable narrow-line Seyfert 1 galaxy NGC 4748 using observations in the year 2017 and 2014 performed with AstroSat and XMM-Newton , respectively. Both observations show extremely… read more here.
Keywords: galaxy ngc; line; variable narrow; seyfert galaxy ... See more keywords
Probing narrow-line Seyfert 1 galaxies in the southern hemisphere
Sign Up to like & getrecommendations! Published in 2018 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201832678
Abstract: We present a new accurate catalog of narrow-line Seyfert 1 galaxies (NLS1s) in the southern hemisphere from the Six-degree Field Galaxy Survey (6dFGS) final data release, which is currently the most extensive spectroscopic survey available… read more here.
Keywords: probing narrow; seyfert galaxies; southern hemisphere; line seyfert ... See more keywords
Broadband X-ray observations of four gamma-ray narrow-line Seyfert 1 galaxies
Sign Up to like & getrecommendations! Published in 2019 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201935929
Abstract: Narrow-line Seyfert 1 galaxies (NLS1s) is one of the few classes of active galactic nuclei (AGN) harboring powerful relativistic jets and detected in $\gamma$ rays. NLS1s are well-known X-ray sources. While in non-jetted sources the… read more here.
Keywords: narrow line; line; seyfert galaxies; line seyfert ... See more keywords
Detection of a variable ultrafast outflow in the narrow-line Seyfert 1 galaxy PG 1448+273
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa1425
Abstract: Relativistically blueshifted absorption features of highly ionised ions, the so-called ultra-fast outflows (UFOs), have been detected in the X-ray spectra of a number of accreting supermassive black holes. If these features truly originate from accretion… read more here.
Keywords: detection; 1448 273; seyfert galaxy; line seyfert ... See more keywords
A Suzaku sample of unabsorbed narrow-line and broad-line Seyfert 1 galaxies – I. X-ray spectral properties
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa2783
Abstract: A sample of narrow-line (NLS1) and broad-line Seyfert 1 (BLS1) galaxies observed with Suzaku is presented. The final sample consists of 22 NLS1s and 47 BLS1s, for a total of 69 AGN that are all… read more here.
Keywords: soft hard; line; hard excesses; line seyfert ... See more keywords
The radio structure of the narrow-line Seyfert 1 Mrk 783 with VLBA and e-MERLIN
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa3024
Abstract: In this paper, we present the analysis of new radio and optical observations of the narrow-line Seyfert 1 galaxy Mrk 783. 1.6 GHz observations performed with the e-MERLIN interferometer confirm the presence of the diffuse… read more here.
Keywords: mrk 783; radio; radio structure; line seyfert ... See more keywords
The southern hemisphere narrow-line seyfert 1 infrared survey
Sign Up to like & getrecommendations! Published in 2021 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stab2946
Abstract: We present a near-infrared spectroscopic survey of narrow-line Seyfert 1 galaxies in the Southern hemisphere (using the SOFI instrument on the ESO-NTT telescope), sampled from optical surveys. We examine the kinematics of the broad-line region,… read more here.
Keywords: narrow line; line; line region; survey ... See more keywords
An XMM-Newton Study of Six Narrow-Line Seyfert 1 Galaxies at z = 0.35 − 0.92
Sign Up to like & getrecommendations! Published in 2023 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stad1327
Abstract: We report a detailed analysis of the XMM-Newton spectra of six Narrow-Line Seyfert 1 (NLS1) galaxies at redshift z = 0.35 − 0.92. Compared with the NLS1s at lower redshift in the previously most-studied sample,… read more here.
Keywords: narrow line; six narrow; line seyfert; xmm newton ... See more keywords
Multi-wavelength variability of γ-ray emitting narrow-line seyfert 1 galaxies
Sign Up to like & getrecommendations! Published in 2023 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stad1415
Abstract: As one of the drivers of feedback in active galactic nuclei (AGN), the jets launched from supermassive black holes (SMBHs) are important for understanding the co-evolution of SMBHs and their host galaxies. However, the formation… read more here.
Keywords: narrow line; multi wavelength; line seyfert; ray ... See more keywords